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Pneumatic Three-Way Regulating Valve

Keywords: metering pump accessories

Classification:

Pneumatic control valve

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  • DESCRIPTION

     jTechnical parameters and performance

    n valve body

    Model

    Straight through cast ball valve

    Nominal diameter

    Merging valve: 25~300mm, diverting valve: 80~300mm

    Nominal pressure

    PN1.6、4.0、6.4MPa

    Flange standard

    JB/T79.1-94, 79.2-94, etc.

    Material

    Cast steel (ZG230-450), cast stainless steel (ZG1Cr18Ni9Ti, ZG1Cr18Ni12Mo2Ti), etc.

    Upper valve cover

    Standard type -17~+230℃, heat dissipation type +230~+450℃, bellows sealed type -40~+350℃

    Gland type

    Bolt pressing type

    filler

    V-type PTFE filler, impregnated PTFE asbestos filler, graphite filler

    Structure type

    (See Figure 1~Figure 6 for details)

     

    n Valve internal components

    Valve core type

    Thin-walled cylindrical valve core

    Traffic characteristics

    Parabolic and linear characteristics

    Material

    Stainless steel (1Cr18Ni9Ti, 1Cr18Ni12Mo2Ti, 17-4PH, 9Cr18, 316L), stainless steel nickel cladding welding department

    Tailai alloy, titanium and corrosion-resistant alloys, etc.

     

    n executive agency

    Model

    ZHA/B multi-spring diaphragm actuator

    model

    ZHA/B-22

    ZHA/B-23

    ZHA/B-34

    ZHA/B-45

    ZHA/B-56

    Effective area cm²

    350

    350

    560

    900

    1400

    Stroke mm

    10、16

    25

    40

    40、60

    100

    Spring range KPa

    20~100 (standard), 20-60, 60-100, 40-200, 80-240

    Diaphragm material

    Nitrile rubber sandwiched with nylon cloth, ethylene propylene rubber sandwiched with nylon cloth

    Air supply pressure

    140~400KPa

    Air source excuse

    RC1/4″

    ambient temperature

    -30~+70℃

    n Valve action type

    Air-closed type (B) - the valve position is open (FO) when the air is lost; air-open type (K) - the valve position is closed (FC) when the air is lost.

    n attachments

    Positioner, air filter pressure reducer, position retaining valve, travel switch, valve position transmitter, handwheel mechanism, etc.

    performance

    project

    Without locator

    With locator

    Basic error%

    ±6.0

    ±1.5

    Times difference %

    ≤5

    ≤1.5

    dead zone%

    ≤4

    ≤0.6

    Always point deviation %

    Be angry

    starting point

    ±2.5

    ±1.5

    end

    ±6.0

    Qiguan

    starting point

    ±6.0

    end

    ±2.5

    Rated stroke deviation %

    ≤2.5

    Leakage volume 1/h

    0.1%×valve rated capacity

    Adjustable range R

    30:1

     

    3. Rated flow system Kv, rated stroke, equipped actuator model, allowable pressure difference

    Note: For bellows seal control valves, the maximum allowable pressure difference is 1.0MPa. If the value in the table is less than 1.0MPa, it will remain unchanged. If it is greater than 1.0MPa, it will be 1.0MPa.

    4. Valve body structure

    5. Appearance and installation dimensions